Patents by Inventor Walti Schmitt

Walti Schmitt has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for conditioning and dewatering sludges
    Patent number: 5037559
    Abstract: During conditioning of a suspension to be dewatered through incorporation of flocculant, the optimum dewaterability depends on the amount of added flocculant and on the mixing energy expended. According to the invention, the sludge flocs present or formed in the suspension after incorporation of the flocculant are determined metrologically, and the amount of flocculant and/or the mixing energy expended and/or the location of flocculant addition is controlled as a function of the floc number, size and/or structure.
    Type: Grant
    Filed: December 28, 1989
    Date of Patent: August 6, 1991
    Assignee: Passavant-Werke AG
    Inventor: Walti Schmitt
  • Rotary aerator
    Patent number: 3960991
    Abstract: A rotary aerator is mounted for rotation about a horizontal axis and has a plurality of agitator elements formed integrally with hub segments to provide generally star-shaped members which extend radially from the circumference of the aerator along the length thereof for introducing air or other gases into waste water or other fluids.
    Type: Grant
    Filed: June 3, 1974
    Date of Patent: June 1, 1976
    Assignee: Passavant-Werke Michelbacher Hutte
    Inventors: Walti Schmitt, Philipp Kreiner